media: uapi: move MPEG-2 stateless controls out of staging
Until now, the MPEG-2 V4L2 API was not exported as a public API, and only defined in a private media header (media/mpeg2-ctrls.h). After reviewing the MPEG-2 specification in detail, and reworking the controls so they match the MPEG-2 semantics properly, we can consider it ready. Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com> Tested-by: Jernej Skrabec <jernej.skrabec@siol.net> Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net> Tested-by: Daniel Almeida <daniel.almeida@collabora.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ezequiel Garcia
committed by
Mauro Carvalho Chehab
Mauro Carvalho Chehab
parent
3c994c6d21
commit
f4815b3991
@@ -1244,3 +1244,217 @@ FWHT Flags
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* - __u8
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- ``padding[3]``
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- Applications and drivers must set this to zero.
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.. _v4l2-codec-stateless-mpeg2:
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``V4L2_CID_STATELESS_MPEG2_SEQUENCE (struct)``
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Specifies the sequence parameters (as extracted from the bitstream) for the
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associated MPEG-2 slice data. This includes fields matching the syntax
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elements from the sequence header and sequence extension parts of the
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bitstream as specified by :ref:`mpeg2part2`.
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.. c:type:: v4l2_ctrl_mpeg2_sequence
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.. raw:: latex
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\small
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.. cssclass:: longtable
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.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
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.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - __u16
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- ``horizontal_size``
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- The width of the displayable part of the frame's luminance component.
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* - __u16
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- ``vertical_size``
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- The height of the displayable part of the frame's luminance component.
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* - __u32
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- ``vbv_buffer_size``
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- Used to calculate the required size of the video buffering verifier,
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defined (in bits) as: 16 * 1024 * vbv_buffer_size.
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* - __u16
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- ``profile_and_level_indication``
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- The current profile and level indication as extracted from the
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bitstream.
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* - __u8
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- ``chroma_format``
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- The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
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* - __u8
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- ``flags``
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- See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
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.. _mpeg2_sequence_flags:
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``MPEG-2 Sequence Flags``
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.. cssclass:: longtable
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - ``V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE``
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- 0x01
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- Indication that all the frames for the sequence are progressive instead
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of interlaced.
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.. raw:: latex
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\normalsize
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``V4L2_CID_STATELESS_MPEG2_PICTURE (struct)``
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Specifies the picture parameters (as extracted from the bitstream) for the
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associated MPEG-2 slice data. This includes fields matching the syntax
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elements from the picture header and picture coding extension parts of the
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bitstream as specified by :ref:`mpeg2part2`.
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.. c:type:: v4l2_ctrl_mpeg2_picture
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.. raw:: latex
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\small
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.. cssclass:: longtable
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.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
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.. flat-table:: struct v4l2_ctrl_mpeg2_picture
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - __u64
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- ``backward_ref_ts``
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- Timestamp of the V4L2 capture buffer to use as backward reference, used
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with B-coded and P-coded frames. The timestamp refers to the
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``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
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:c:func:`v4l2_timeval_to_ns()` function to convert the struct
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:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
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* - __u64
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- ``forward_ref_ts``
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- Timestamp for the V4L2 capture buffer to use as forward reference, used
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with B-coded frames. The timestamp refers to the ``timestamp`` field in
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struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
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function to convert the struct :c:type:`timeval` in struct
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:c:type:`v4l2_buffer` to a __u64.
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* - __u32
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- ``flags``
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- See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
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* - __u8
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- ``f_code[2][2]``
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- Motion vector codes.
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* - __u8
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- ``picture_coding_type``
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- Picture coding type for the frame covered by the current slice
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(V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
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V4L2_MPEG2_PICTURE_CODING_TYPE_B).
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* - __u8
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- ``picture_structure``
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- Picture structure (1: interlaced top field, 2: interlaced bottom field,
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3: progressive frame).
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* - __u8
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- ``intra_dc_precision``
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- Precision of Discrete Cosine transform (0: 8 bits precision,
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1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
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* - __u8
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- ``reserved[5]``
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- Applications and drivers must set this to zero.
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.. _mpeg2_picture_flags:
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``MPEG-2 Picture Flags``
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.. cssclass:: longtable
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - ``V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST``
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- 0x00000001
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- If set and it's an interlaced stream, top field is output first.
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* - ``V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT``
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- 0x00000002
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- If set only frame-DCT and frame prediction are used.
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* - ``V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV``
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- 0x00000004
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- If set motion vectors are coded for intra macroblocks.
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* - ``V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE``
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- 0x00000008
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- This flag affects the inverse quantization process.
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* - ``V4L2_MPEG2_PIC_FLAG_INTRA_VLC``
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- 0x00000010
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- This flag affects the decoding of transform coefficient data.
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* - ``V4L2_MPEG2_PIC_FLAG_ALT_SCAN``
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- 0x00000020
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- This flag affects the decoding of transform coefficient data.
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* - ``V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST``
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- 0x00000040
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- This flag affects the decoding process of progressive frames.
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* - ``V4L2_MPEG2_PIC_FLAG_PROGRESSIVE``
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- 0x00000080
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- Indicates whether the current frame is progressive.
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.. raw:: latex
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\normalsize
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``V4L2_CID_STATELESS_MPEG2_QUANTISATION (struct)``
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Specifies quantisation matrices, in zigzag scanning order, for the
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associated MPEG-2 slice data. This control is initialized by the kernel
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to the matrices default values. If a bitstream transmits a user-defined
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quantisation matrices load, applications are expected to use this control.
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Applications are also expected to set the control loading the default
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values, if the quantisation matrices need to be reset, for instance on a
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sequence header. This process is specified by section 6.3.7.
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"Quant matrix extension" of the specification.
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.. c:type:: v4l2_ctrl_mpeg2_quantisation
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.. tabularcolumns:: |p{0.8cm}|p{8.0cm}|p{8.5cm}|
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.. cssclass:: longtable
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.. raw:: latex
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\small
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.. flat-table:: struct v4l2_ctrl_mpeg2_quantisation
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - __u8
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- ``intra_quantiser_matrix[64]``
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- The quantisation matrix coefficients for intra-coded frames, in zigzag
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scanning order. It is relevant for both luma and chroma components,
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although it can be superseded by the chroma-specific matrix for
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non-4:2:0 YUV formats.
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* - __u8
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- ``non_intra_quantiser_matrix[64]``
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- The quantisation matrix coefficients for non-intra-coded frames, in
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zigzag scanning order. It is relevant for both luma and chroma
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components, although it can be superseded by the chroma-specific matrix
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for non-4:2:0 YUV formats.
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* - __u8
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- ``chroma_intra_quantiser_matrix[64]``
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- The quantisation matrix coefficients for the chominance component of
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intra-coded frames, in zigzag scanning order. Only relevant for
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non-4:2:0 YUV formats.
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* - __u8
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- ``chroma_non_intra_quantiser_matrix[64]``
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- The quantisation matrix coefficients for the chrominance component of
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non-intra-coded frames, in zigzag scanning order. Only relevant for
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non-4:2:0 YUV formats.
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.. raw:: latex
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\normalsize
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@@ -1606,222 +1606,6 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
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``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)``
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Indicates bit rate (bps) for hierarchical coding layer 6 for H264 encoder.
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.. _v4l2-mpeg-mpeg2:
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``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (struct)``
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Specifies the sequence parameters (as extracted from the bitstream) for the
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associated MPEG-2 slice data. This includes fields matching the syntax
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elements from the sequence header and sequence extension parts of the
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bitstream as specified by :ref:`mpeg2part2`.
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.. note::
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This compound control is not yet part of the public kernel API and
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it is expected to change.
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.. c:type:: v4l2_ctrl_mpeg2_sequence
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.. cssclass:: longtable
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.. tabularcolumns:: |p{1.4cm}|p{6.5cm}|p{9.4cm}|
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.. flat-table:: struct v4l2_ctrl_mpeg2_sequence
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - __u16
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- ``horizontal_size``
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- The width of the displayable part of the frame's luminance component.
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* - __u16
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- ``vertical_size``
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- The height of the displayable part of the frame's luminance component.
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* - __u32
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- ``vbv_buffer_size``
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- Used to calculate the required size of the video buffering verifier,
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defined (in bits) as: 16 * 1024 * vbv_buffer_size.
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* - __u16
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- ``profile_and_level_indication``
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- The current profile and level indication as extracted from the
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bitstream.
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* - __u8
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- ``chroma_format``
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- The chrominance sub-sampling format (1: 4:2:0, 2: 4:2:2, 3: 4:4:4).
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* - __u8
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- ``flags``
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- See :ref:`MPEG-2 Sequence Flags <mpeg2_sequence_flags>`.
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.. _mpeg2_sequence_flags:
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``MPEG-2 Sequence Flags``
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.. cssclass:: longtable
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - ``V4L2_MPEG2_SEQ_FLAG_PROGRESSIVE``
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- 0x01
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- Indication that all the frames for the sequence are progressive instead
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of interlaced.
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``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (struct)``
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Specifies the picture parameters (as extracted from the bitstream) for the
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associated MPEG-2 slice data. This includes fields matching the syntax
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elements from the picture header and picture coding extension parts of the
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bitstream as specified by :ref:`mpeg2part2`.
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.. note::
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This compound control is not yet part of the public kernel API and
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it is expected to change.
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.. c:type:: v4l2_ctrl_mpeg2_picture
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.. raw:: latex
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\small
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.. cssclass:: longtable
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.. tabularcolumns:: |p{1.0cm}|p{5.6cm}|p{10.7cm}|
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.. flat-table:: struct v4l2_ctrl_mpeg2_picture
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - __u64
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- ``backward_ref_ts``
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- Timestamp of the V4L2 capture buffer to use as backward reference, used
|
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with B-coded and P-coded frames. The timestamp refers to the
|
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``timestamp`` field in struct :c:type:`v4l2_buffer`. Use the
|
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:c:func:`v4l2_timeval_to_ns()` function to convert the struct
|
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:c:type:`timeval` in struct :c:type:`v4l2_buffer` to a __u64.
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* - __u64
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- ``forward_ref_ts``
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- Timestamp for the V4L2 capture buffer to use as forward reference, used
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with B-coded frames. The timestamp refers to the ``timestamp`` field in
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struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
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function to convert the struct :c:type:`timeval` in struct
|
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:c:type:`v4l2_buffer` to a __u64.
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* - __u32
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- ``flags``
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- See :ref:`MPEG-2 Picture Flags <mpeg2_picture_flags>`.
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* - __u8
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- ``f_code[2][2]``
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- Motion vector codes.
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* - __u8
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- ``picture_coding_type``
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- Picture coding type for the frame covered by the current slice
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(V4L2_MPEG2_PICTURE_CODING_TYPE_I, V4L2_MPEG2_PICTURE_CODING_TYPE_P or
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V4L2_MPEG2_PICTURE_CODING_TYPE_B).
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* - __u8
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- ``picture_structure``
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- Picture structure (1: interlaced top field, 2: interlaced bottom field,
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3: progressive frame).
|
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* - __u8
|
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- ``intra_dc_precision``
|
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- Precision of Discrete Cosine transform (0: 8 bits precision,
|
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1: 9 bits precision, 2: 10 bits precision, 3: 11 bits precision).
|
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* - __u8
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- ``reserved[5]``
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- Applications and drivers must set this to zero.
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.. _mpeg2_picture_flags:
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``MPEG-2 Picture Flags``
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.. cssclass:: longtable
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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|
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* - ``V4L2_MPEG2_PIC_FLAG_TOP_FIELD_FIRST``
|
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- 0x00000001
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- If set and it's an interlaced stream, top field is output first.
|
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* - ``V4L2_MPEG2_PIC_FLAG_FRAME_PRED_DCT``
|
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- 0x00000002
|
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- If set only frame-DCT and frame prediction are used.
|
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* - ``V4L2_MPEG2_PIC_FLAG_CONCEALMENT_MV``
|
||||
- 0x00000004
|
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- If set motion vectors are coded for intra macroblocks.
|
||||
* - ``V4L2_MPEG2_PIC_FLAG_Q_SCALE_TYPE``
|
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- 0x00000008
|
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- This flag affects the inverse quantization process.
|
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* - ``V4L2_MPEG2_PIC_FLAG_INTRA_VLC``
|
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- 0x00000010
|
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- This flag affects the decoding of transform coefficient data.
|
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* - ``V4L2_MPEG2_PIC_FLAG_ALT_SCAN``
|
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- 0x00000020
|
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- This flag affects the decoding of transform coefficient data.
|
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* - ``V4L2_MPEG2_PIC_FLAG_REPEAT_FIRST``
|
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- 0x00000040
|
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- This flag affects the decoding process of progressive frames.
|
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* - ``V4L2_MPEG2_PIC_FLAG_PROGRESSIVE``
|
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- 0x00000080
|
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- Indicates whether the current frame is progressive.
|
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|
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.. raw:: latex
|
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|
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\normalsize
|
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|
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``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION (struct)``
|
||||
Specifies quantisation matrices (as extracted from the bitstream) for the
|
||||
associated MPEG-2 slice data.
|
||||
|
||||
.. note::
|
||||
|
||||
This compound control is not yet part of the public kernel API and
|
||||
it is expected to change.
|
||||
|
||||
.. c:type:: v4l2_ctrl_mpeg2_quantisation
|
||||
|
||||
.. tabularcolumns:: |p{0.8cm}|p{8.0cm}|p{8.5cm}|
|
||||
|
||||
.. cssclass:: longtable
|
||||
|
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.. raw:: latex
|
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|
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\small
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||||
|
||||
.. flat-table:: struct v4l2_ctrl_mpeg2_quantisation
|
||||
:header-rows: 0
|
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:stub-columns: 0
|
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:widths: 1 1 2
|
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|
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* - __u8
|
||||
- ``intra_quantiser_matrix[64]``
|
||||
- The quantisation matrix coefficients for intra-coded frames, in zigzag
|
||||
scanning order. It is relevant for both luma and chroma components,
|
||||
although it can be superseded by the chroma-specific matrix for
|
||||
non-4:2:0 YUV formats.
|
||||
* - __u8
|
||||
- ``non_intra_quantiser_matrix[64]``
|
||||
- The quantisation matrix coefficients for non-intra-coded frames, in
|
||||
zigzag scanning order. It is relevant for both luma and chroma
|
||||
components, although it can be superseded by the chroma-specific matrix
|
||||
for non-4:2:0 YUV formats.
|
||||
* - __u8
|
||||
- ``chroma_intra_quantiser_matrix[64]``
|
||||
- The quantisation matrix coefficients for the chominance component of
|
||||
intra-coded frames, in zigzag scanning order. Only relevant for
|
||||
non-4:2:0 YUV formats.
|
||||
* - __u8
|
||||
- ``chroma_non_intra_quantiser_matrix[64]``
|
||||
- The quantisation matrix coefficients for the chrominance component of
|
||||
non-intra-coded frames, in zigzag scanning order. Only relevant for
|
||||
non-4:2:0 YUV formats.
|
||||
|
||||
.. raw:: latex
|
||||
|
||||
\normalsize
|
||||
|
||||
``V4L2_CID_FWHT_I_FRAME_QP (integer)``
|
||||
Quantization parameter for an I frame for FWHT. Valid range: from 1
|
||||
to 31.
|
||||
|
||||
@@ -112,13 +112,13 @@ Compressed Formats
|
||||
- 'MG2S'
|
||||
- MPEG-2 parsed slice data, as extracted from the MPEG-2 bitstream.
|
||||
This format is adapted for stateless video decoders that implement a
|
||||
MPEG-2 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
|
||||
MPEG-2 pipeline with the :ref:`stateless_decoder`.
|
||||
Metadata associated with the frame to decode is required to be passed
|
||||
through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE`` and
|
||||
``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE`` controls.
|
||||
through the ``V4L2_CID_STATELESS_MPEG2_SEQUENCE`` and
|
||||
``V4L2_CID_STATELESS_MPEG2_PICTURE`` controls.
|
||||
Quantisation matrices can optionally be specified through the
|
||||
``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION`` control.
|
||||
See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`.
|
||||
``V4L2_CID_STATELESS_MPEG2_QUANTISATION`` control.
|
||||
See the :ref:`associated Codec Control IDs <v4l2-codec-stateless-mpeg2>`.
|
||||
Exactly one output and one capture buffer must be provided for use with
|
||||
this pixel format. The output buffer must contain the appropriate number
|
||||
of macroblocks to decode a full corresponding frame to the matching
|
||||
|
||||
@@ -221,6 +221,18 @@ still cause this situation.
|
||||
- ``p_vp8_frame``
|
||||
- A pointer to a struct :c:type:`v4l2_ctrl_vp8_frame`. Valid if this control is
|
||||
of type ``V4L2_CTRL_TYPE_VP8_FRAME``.
|
||||
* - struct :c:type:`v4l2_ctrl_mpeg2_sequence` *
|
||||
- ``p_mpeg2_sequence``
|
||||
- A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_sequence`. Valid if this control is
|
||||
of type ``V4L2_CTRL_TYPE_MPEG2_SEQUENCE``.
|
||||
* - struct :c:type:`v4l2_ctrl_mpeg2_picture` *
|
||||
- ``p_mpeg2_picture``
|
||||
- A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_picture`. Valid if this control is
|
||||
of type ``V4L2_CTRL_TYPE_MPEG2_PICTURE``.
|
||||
* - struct :c:type:`v4l2_ctrl_mpeg2_quantisation` *
|
||||
- ``p_mpeg2_quantisation``
|
||||
- A pointer to a struct :c:type:`v4l2_ctrl_mpeg2_quantisation`. Valid if this control is
|
||||
of type ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION``.
|
||||
* - struct :c:type:`v4l2_ctrl_hdr10_cll_info` *
|
||||
- ``p_hdr10_cll``
|
||||
- A pointer to a struct :c:type:`v4l2_ctrl_hdr10_cll_info`. Valid if this control is
|
||||
|
||||
Reference in New Issue
Block a user